The exterior of a supersonic airplane is made of aluminum,which has a coefficient of linear expansion of 
.At 15°C,the plane measures 62.1 m in length.When the plane is in flight,friction with the air increases the temperature of the exterior skin to 200°C.What is the change in the length of the outer skin of the plane?
A) 20 cm
B) 24 cm
C) 28 cm
D) 32 cm
E) 36 cm
Correct Answer:
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